reseed vs sustain

reseed and sustain both are verbs.

Word	Noun	Adjective	Verb	Adverb
reseed	No	No	Yes	No
sustain	No	No	Yes	No

As verbs, sustain is a hypernym of reseed; that is, sustain is a word with a broader meaning than reseed:

Other hypernyms of reseed include keep, maintain.

reseed (verb)	sustain (verb)
maintain by seeding without human intervention	undergo (as of injuries and illnesses)
seed again or anew	establish or strengthen as with new evidence or facts
	admit as valid
	supply with necessities and support
	provide with nourishment
	be the physical support of; carry the weight of
	lengthen or extend in duration or space